Transitions from Digital Communications to Quantum Communications: Concepts and Prospects
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This book addresses the move towards quantum communications, in light of the recent technological developments on photonic crystals and their potential applications in systems.
The authors present the state of the art on extensive quantum communications, the first part of the book being dedicated to the relevant theory; quantum gates such as Deutsch gates, Toffoli gates and Dedekind gates are reviewed with regards to their feasibility as electronic circuits and their implementation in systems, and a comparison is performed in parallel with conventional circuits such as FPGAs and DSPs. The specifics of quantum communication are also revealed through the entanglement and Bell states, and mathematical and physical aspects of quantum optical fibers and photonic crystals are considered in order to optimize the quantum transmissions.
These concepts are linked with relevant, practical examples in the second part of the book, which presents six integrated applications for quantum communications.
Malek Benslama
Malek Benslama is currently Professor at the University of Constantine 1 in Algeria. He is also Doctor of Science with the INP Toulouse in France and a member of the scientific council of the Algerian Space Agency.
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Transitions from Digital Communications to Quantum Communications - Malek Benslama
Table of Contents
Cover
Dedication
Title
Copyright
Foreword
Preface
Introduction
List of Acronyms
PART 1: Theory
1 Non-linear Signal Processing
1.1. Distributions
1.2. Variance
1.3. Covariance
1.4. Stationarity
1.5. Bayes inference
1.6. Tensors in signal processing
1.7. Processing the quantum signal
2 Non-Gaussian Processes
2.1. Defining Gaussian processes
2.2. Non-Gaussian processes
2.3. Principal component analysis or Karhunen–Loève transformation
2.4. Sparse Gaussian processes
2.5. Levy process
2.6. Links with quantum communications
3 Sparse Signals and Compressed Sensing
3.1. Sparse Signals
3.2. Compressed sensing
3.3. Compressed sensing and quantum signal
4 The Fourier Transform
4.1. The Classic Fourier Transform
4.2. The Discreet Fourier Transform and the Fast Fourier Transform
4.3. The Fourier Transform and hyper-functions
4.4. Hilbert Transform
4.5. Clifford algebra and the Fourier Transform
4.6. Spinors and quantum signals
5 The Contribution of Arithmetic to Signal Processing
5.1. Gauss sums
5.2. Applications for Gauss sums
6 Riemannian Geometry and Signal Processing
6.1. Context
6.2. Riemannian varieties
6.3. Voronoi cells
6.4. Applications to Voronoi cells
PART 2: Applications
7 MIMO Systems
7.1. Introduction
7.2. A brief history of OFDM
7.3. Multi-carrier technology
7.4. OFDM technique
7.5. Generating OFDM symbols
7.6. Inter-symbol and inter-carrier interference
7.7. Cyclic prefix
7.8. Mathematical model of the OFDM system
7.9. MIMO channels
7.10. The MIMO channel model
7.11. MIMO OFDM channel model
8 Minimizing Interferences in DS–CDMA Systems
8.1. Convolutional encoding
8.2. Structure of convolutive codes
8.3. Polynomial representation
8.4. Graphic representations of convolutive codes
8.5. Decoding algorithms
8.6. Discreet Wavelet Transform (DWT)
8.7. Construction and discreet filtering
8.8. Defining the wavelet function: the place of detail
8.9. Wavelets and filter banks
8.10. Thresholding coefficients
8.11. Simulating results
9 STAP Radar
9.1. Introduction
9.2. Space–time adaptive processing (STAP)
9.3. Structure of the covariance matrix
9.4. Clutter
9.5. Optimal STAP
9.6. Performance measures
9.7. Influence of the radar’s parameters on detection
9.8. Sample matrix inversion algorithm (SMI)
9.9. Conclusion
10 Tracking Radar (Using the Dempster–Shafer Theory)
10.1. Introduction
10.2. Dempster–Shafer theory
10.3. Rules of combination
10.4. Decision rules
10.5. Digital simulation
10.6. Conclusion
11 InSAR Radar
11.1. Introduction
11.2. Coherence
11.3. System model
11.4. Inferometric phase statistics
11.5. Quantitative examples
11.6. Conclusion
12 Telecommunications Networks
12.1. Introduction
12.2. Describing the ad hoc simulated network’s topology
12.3. The different scenarios enacted
12.4. The statistics collected
12.5. Discussion of results
12.6. Part two: network using OLSR for routing
12.7. Conclusion
Conclusion
Bibliography
Index
End User License Agreement
List of Tables
1 Non-linear Signal Processing
Table 1.1. Devices, topics and main discoverers
9 STAP Radar
Table 9.1. Radar system parameters
10 Tracking Radar (Using the Dempster–Shafer Theory)
Table 10.1. Table of combined masses
List of Illustrations
1 Non-linear Signal Processing
Figure 1.1. Generalized Bayesian inference process
2 Non-Gaussian Processes
Figure 2.1. Probability distribution in Q of the linear superposition of two coherent states
Figure 2.2. Probability distribution in P compared to a linear superposition (plain line) and a statistical mix (dotted line) of two coherent states
3 Sparse Signals and Compressed Sensing
Figure 3.1. Sparse discreet-time signal with its DFT
Figure 3.2. Manifestation of sparsity in the frequency domain
Figure 3.3. Block diagram of an iterative reconstruction method. The masking is an appropriate filter with coefficients of 1 and 0 according to the type of sparsity in the original signal
Figure 3.4. Original Gaussian signal with 100 spikes
Figure 3.5. Reconstructed signal and the tally with the coefficients by coefficient of x0 depending on its reconstruction
Figure 3.6. An algorithmic overview of compressed sensing
6 Riemannian Geometry and Signal Processing
Figure 6.1. Superposition of a Voronoi diagram (in red) and its Delaunay triangulation (in black). For a color version of this figure, see www.iste.co.uk/benslama/question.zip
7 MIMO Systems
Figure 7.1. Effect of a fading on serial and parallel systems
Figure 7.2. An OFDM sub-carrier transmitter
Figure 7.3. Subdivision of the bandwidth into N sub-carriers
Figure 7.4. Multi-carrier modulation
Figure 7.5. The overlapped spectrum of an OFDM signal. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 7.6. OFDM demodulation using correlators
Figure 7.7. Diagram of a MIMO OFDM system
Figure 7.8. Cyclic prefix
Figure 7.9. A basic FFT OFDM transmitter-receiver [GER 05]
Figure 7.10. The continuous time OFDM system interpreted as parallel Gaussian channels
Figure 7.11. A standard approach for a MIMO–OFDM system with four transmitting antennae and four receiving antennae
Figure 7.12. Model of a MIMO–OFDM system
8 Minimizing Interferences in DS–CDMA Systems
Figure 8.1. Convolutive performance coder = 1/n
Figure 8.2. Tree diagram for k = 1, n = 2 and L = 3
Figure 8.3. State diagram for k = 1, n = 2 and L = 3
Figure 8.4. Trellis diagram for k=1, n =2 and L= 3
Figure 8.5. Cubic spline wavelet function and its Fourier transform
Figure 8.6. Direct and inverse fast wavelet transform
Figure 8.7. The TOR for a vector of N=2³ samples
Figure 8.8. Diagram of the threshold principle
Figure 8.9. Hard thresholding
Figure 8.10. Soft thresholding
Figure 8.11. BER according to the SNR with N=63 for a coded channel. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 8.12. BER according to K with SNR = 0 dB for a coded channel. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 8.13. BER according to the SNR with N=63 for the developed approach. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 8.14. Comparison of the BER according to the SNR for the three approaches. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 8.15. BER according to K for SNR = 0 dB for the developed approach
Figure 8.16. Comparison of BER according to K for the three approaches. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
9 STAP Radar
Figure 9.1. Space–time filter
Figure 9.2. Geometry of the configuration of an airborne side-looking radar
Figure 9.3. Conventional STAP chain
Figure 9.4. General structure of the STAP filter. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 9.5. STAP data cube
Figure 9.6. Illustration of the clutter model
Figure 9.7. Clutter crests for different values of PRF
Figure 9.8. The optimal STAP filter’s response, at zero degrees of elevation, in the presence of two jammers at -60° and JNR=40 dB, N=12, M=10 and CNR=40 dB. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 9.9. Improvement factor for the optimal processor DFP. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 9.10. Improvement factor for the optimal processor DFP with. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 9.11. Improvement factor for the optimal processor DFP for different spacings: a) , b)
Figure 9.12. Improvement factor for the optimal processor DFP with PRF constant, N = 8, M = 10, d/λ = 0.5:
Figure 9.13. Angle/Doppler spectrum in the presence of two jammers at -40° and 60° with JNR = 45 dB, N=8, M=10, CNR = 20 dB, β = 0.5, β = 1, β = 2. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 9.14. Improvement factor for the optimal processor DFP with ; a) Bs = 0; b) Bs = 0.1
Figure 9.15. This figure illustrates the filter’s angle/Doppler response using the SMI algorithm. We note that the interferences are cancelled (clutter, jammer) but with a distortion of the secondary lobes by comparison to the optimal STAP. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 9.16. The filter’s angle/Doppler response using the SMI algorithm target inserted in cell 50, Ft=0.3 and in the presence of two jammers at JNR=40 dB and CNR=20 dB. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
10 Tracking Radar (Using the Dempster–Shafer Theory)
Figure 10.1. Different mass function measures
Figure 10.2. Credibility and plausibility of a set A
Figure 10.3. Representing the evidence of a set A
Figure 10.4. Linking measurements to the corresponding targets
Figure 10.5. Association steps
Figure 10.6. Real trajectories and those estimated using DST for three parallel targets. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 10.7. Combination rate for the three parallel targets; a) separations between the targets 50 m; b) separations between the targets 100 m; c) separations between the targets 150 m
Figure 10.8. Real trajectories and those estimated using DST for three intersecting targets. For a color version of this figure, see www.iste.co.uk/benslama/quantum.zip
Figure 10.9. Combination rate for three intersecting targets; a) Intersection point N/4; b) Intersection point N/2; c) Intersection point 3N/4
11 InSAR Radar
Figure 11.1. Formation system model INSAR [HAG 70]
Figure 11.2. The inferometric phase’s probability density functin for different values of the correlation coefficient
Figure 11.3. Standard deviation of the interferometric phase compared to the size of the correlation coefficient
Figure 11.4. Standard deviation for the phase compared to the SNR
Figure 11.5. The phase deviation according to the relative change between the two images as a fraction of a resolution element
Figure 11.6. a) The bias phase according to the error phase at the edges of the azimuth bandwidth; b) the phase deviation according to the phase error at the edges of the azimuth bandwidth
Figure 11.7. The phase deviation migration of an incorrect resolution element’s linear gate
Figure 11.8. The phase deviation compared to the non-compensated quadratic gate’s migration expressed in fractions ε
12 Telecommunications Networks
Figure 12.1. Ad hoc topology network introducing the concept of Mutihoming
Figure 12.2. Routing traffic (AODV messages) sent by all the nodes in the network at packets/sec. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.3. The traffic sent by the source in both scenarios (packets/sec). For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.4. Traffic received by the destination node in both scenarios (packetts/sec). For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.5. AODV packets sent throughout the network. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.6. Packets received by destination. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.7. Packets sent by source. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.8. The traffic load received by router 3 in scenarios 2 and 3. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.9. Total traffic routing (OLSR message) on the network. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.10. The traffic sent by the source. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.11. Traffic received by the destination node. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.12. Total routing traffic on the network. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.13. Traffic sent by the source. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.14. Traffic received by the destination node. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.15. The traffic load received by router 3 in scenarios 2 and 3. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
Figure 12.16. Traffic received by router 3 for both protocols. For a color version of this figure, see www.iste.co.uk./benslama/quantum.zip
To my Mother, with my deep gratitude and affection
Series Editor
Guy Pujolle
Transitions from Digital Communications to Quantum Communications
Concepts and Prospects
Malek Benslama
Hadj Batatia
Abderraouf Messai
Wiley LogoFirst published 2016 in Great Britain and the United States by ISTE Ltd and John Wiley & Sons, Inc.
Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act 1988, this publication may only be reproduced, stored or transmitted, in any form or by any means, with the prior permission in writing of the publishers, or in the case of reprographic reproduction in accordance with the terms and licenses issued by the CLA. Enquiries concerning reproduction outside these terms should be sent to the publishers at the undermentioned address:
ISTE Ltd
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www.iste.co.uk
John Wiley & Sons, Inc.
111 River Street
Hoboken, NJ 07030
USA
www.wiley.com
© ISTE Ltd 2016
The rights of Malek Benslama, Hadj Batatia and Abderraouf Messai to be identified as the author of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act 1988.
Library of Congress Control Number: 2016940263
British Library Cataloguing-in-Publication Data
A CIP record for this book is available from the British Library
ISBN 978-1-84821-925-0
Foreword
Four works dedicated entirely to satellite communications: this is the challenge set by Professor Malek Benslama of the University of Constantine, who understood that a new discipline was in the process of taking shape.
He demonstrated this by organizing the first international symposium on Electromagnetism, Satellites and Cryptography at Jijel in June 2005. The success of congress, surprising for a first-time event, shows that there was a need to gather, in a single place, specialists with skills that are sometimes very removed from one another. The 140 papers accepted concerned systems for electromagnetic systems as well as circuit and antennae engineering and cryptography, which is very often based on pure mathematics. A synergy between these disciplines is necessary to develop the new field of activity that is satellite communication.
The emergence of new disciplines of this type has already taken place before: for electromagnetic compatibility, it was as necessary to know electrical engineering for driven modes
and choppers
as electromagnetics (radiating modes
) and to be able to define specific experimental protocols. Further back in time, we saw the emergence of computing which, at the start, lay in the field of electronics and was able, over time, to become independent.
Professor Benslama has the outlook and open-mindedness indispensable for bringing to fruition the synthesis between the skills that coexist in satellite telecommunications. I have known him for 28 years and for me it is a real pleasure to remember all these years of close acquaintance. There has not been a year in which we have not had an opportunity to see one another. For 15 years he worked on the interaction between acoustic waves and semi-conductors. He specialized in resolving piezoelectric equations (Rayleigh waves, creeping waves, etc.), and at the same time was interested in theoretical physics. A doctoral thesis in engineering and then a state thesis crowned his professional achievements. Notably, his examination committee included Jeannine Henaf, then Chief Engineer for the National Center for Telecommunications studies. He was already interested in telecommunications, but also, with the presence of Michel Planat, responsible for research at CNRS, in the difficult problem of synchronizing oscillators.
It is with Planat that he created the path that would lead to quantum cryptography. He made this transformation over 10 years, thus moving without any apparent difficulty from Maxwell’s equations to Galois groups. He is now therefore one of the people most likely to dominate all those diverse disciplines that form satellite telecommunications.
I wish, with all my friendly admiration, that these four volumes are with a warm welcome from students and teachers